PPG-33 has a Natural Origin Index (NOI) of 0.00 (scale 0–1) per ISO 16128. Polypropylene glycol repeat unit is propylene oxide throughout; every unit traces to petrochemical propylene, none to natural feedstock. An NOI of 0.00 means 0% of its molecular mass is traceable to a natural, renewable source.

Is PPG-33 natural? NOI 0.00 — Is That Natural?

How we scored it

Polypropylene glycol, 33 mol PO average; every repeat unit is petrochemical propylene oxide, no natural fragment. 0/total=0.0.

What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.

Where it comes from

Made entirely from petrochemical propylene oxide polymerised onto water. No natural or renewable route is used commercially for this polymer.

In plain English

A synthetic conditioning polymer made from propylene oxide, a petroleum-derived building block, with no natural or plant content.

CosIng definition: Poly[oxy(methyl-1,2-ethanediyl)], .alpha.-hydro-.omega.-hydroxy- (33 mol PO average molar ratio)

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References

1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
2PPG-33. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
3PPG-33. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=PPG-33